Description:ZD-G1840 
  lens ring joints' highest pressure used is 3000atm,they have been used 
  on pipe flanges in synthesizing line of ammonia and methand at high 
  pressure and high temperature,in high pressure polymerizing line of 
  polyethylene at 3000 atm.
  Application:
  ZD-G1840 is 
  suitable 
    to sealing of flanges at high temperature and pressure pipings It  is 
    widely applied in petroleum processing,oil refining ,electricity 
    generated by firepower,textile and other light industries,pharmacy 
    ,pipeline  of nature gas,valve etc. 
  Standard:ANSI 
  B16.5-1973、JPI-75-15-70、GB 699、GB1220、JB755、HG20633-9
  
    
      
         Note:The 
          material of the oval ring jont gasket must be 15~20HB 
          lower than the hardness of flange,and this kind of 
          gaskets is non-recyclable.
       
     
   
 
  
    |      The cross section | 
  Available Material:
  
    
      |   Material |   Maximum 
        Hardness |   Temperature( ℃ ) |  Abbreviations | 
    
      |  Brinell |   Rockwell“B”Grade | 
    
      |   Soft Iron |  90 |  56 |   -60~500    |  D | 
    
      |   Low Carbon Steel |  120 |  68 |   -40~540 |  S | 
    
      |    SS304 |  160 |  83 |   -250~540 |  304 | 
    
      |    SS304L |  160 |  83 |   -250~540 |  304L | 
    
      |  SS316 |  160 |  83 |   -200~815 |  316 | 
    
      |  SS316L |  160 |  83 |   -200~815 |  316L | 
    
      |  SS321 |  160 |  83 |   -200~870 |  321 | 
    
      |  SS347 |  160 |  83 |   -200~870 |  347 | 
    
      |  SS410 |  170 |  86 |   -40~850 |  410 | 
    
      |   5Cr-0.5Mo    |  130 |   |   -29~650    |   | 
    
      |   Copper |  80 |   |   -100~315 |   | 
    
      |   Aluminum    |  35 |   |   -200~425 |   | 
    
      |   Inconel 600    |  150 |   |   -100~1095 |   | 
    
      |   Incoloy 825    |  150 |   |   -100~1095 |   | 
    
      |   Monel 400    |  150 |   |   -100~760    |   | 
    
      |   Titanium    |  215 |   |   -200~540 |   | 
    
      |   Nickel 200 - |  110 |   |   200~760 |   | 
    
      |   Hastelloy B2   |  230 |   |   -100~1095    |   | 
    
      |   Hastelloy C276   |  210 |   |   -100~1095    |   | 
  
 
 It is important to use proper packaging, handling and storage methods as 
  any bruise, gouge (dent, ding, etc.) or groove across the seal contact 
  area may prevent uniform coining and continuous intimate contact, 
  resulting in leakage in the area of damage.  Any rough handling or 
  impact contact against hard surfaces or objects may cause damage to a 
  ring gasket that renders it unusable.  Soft iron and carbon steel ring 
  gaskets must be kept dry to prevent rust and pitting.
  The plating on these ring gaskets will provide some rust protection for 
  a short time but any extended storage in a damp atmosphere or wetness 
  may destroy the usefulness of these gaskets.  Stainless steel ring joint 
  gaskets are more tolerant to wet and damp conditions.